RA333 alloy is an alloy material suitable for working in harsh environments with extremely high temperatures. The outstanding performance of RA333 allows it to be used as an explosive forming mold to make spacecraft engines.
RA333 is a high chromium nickel base special alloy. Excellent resistance to oxidation, carburization and thermal shock at high temperatures of 1200°C. RA333 is often used as a replacement alloy for RA330, alloys 600 or 601 when the working environment is not adequate. RA333 is unique in that it is one of the few alloys that can resist corrosion from water to white-hot high temperature corrosion. RA333 has been used to make baffles, hooks and work at 980°C with 3% SO2/SO3 vulcanization. RA333 can also be used to make flare heads for refineries. With heating off, RA333 resists attack from sulfur and polysulfuric acids formed at temperatures below the dew point.
Chemical Composition:
Ni Cr Mo Co W Si Mn C Fe
Mini 44.00 24.00 2.50 2.50 2.50 0.75 -- --
Maxi 47.00 27.00 4.00 4.00 4.00 1.50 2.00 0.08 Balance
material standard
AMS 5593, AMS 5717
ASTM B 718, ASTM B 719, ASTM B 722, ASTM B 723, ASTM B 726
UNS N06333
W.NR./EN 2.4608
product form
RA333 Sheet, RA333 Welded Products
main application
Oil refinery tube supports and coal fired boilers
Heat Treating Muffle Furnaces, Annealing Furnaces, Fan Blades and Fixtures
Muffle furnace for carbon fiber production
Sulfuric acid plant flue gas valve
Liquid glass spinneret
tip of fire
Weld fillers for welding cast heat-resistant alloys
Cement kiln roller slide
Carburization
RA333 was originally developed for service in the field of high temperature and carburization resistance, and is currently one of the most carburizing resistant materials. The performance of RA333 makes it suitable for use in all high temperature carburizing working environments, including radiant tubes, material boxes and industrial furnace conveyor belt bolts that have used RA333 as a material to resist high carbon particles in the atmosphere. The metal dusting resistance of RA333 is also attributed to the silicon and tungsten elements incorporated into the RA333 alloy. The pure nickel-chromium superalloy without silicon and tungsten elements is not enough to be applied to the field of metal dusting. In addition to alloying elements, grain size also affects metal dusting. A good grain size can greatly increase the rate of chromium diffusion to the surface to form a protective film.
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